Joke Collection Website - Mood Talk - The main basis of biological classification is _ _ _ _ and _ _ _.

The main basis of biological classification is _ _ _ _ and _ _ _.

Based on the similarity of biological morphological structure and physiological function, biological classification can be divided into species, genera and other levels, and the morphological structure and physiological function of each group are described scientifically to clarify the genetic relationship and evolutionary relationship between different groups. Classification is based on the characteristics of biological morphological structure and physiological function.

Therefore, the answer is: morphological structure; physiological function